Improvement in telegraph-relays



G. ALLAN & J. W. BROWN.

TELEGRAPH-RELAY.

78,578. Patented June13, 1876.

N-PETERS, PHUTO-LITHOGRAFHER WASHINGTON, D C.

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN TELEGRAPH-RELAYS.

Specification forming part of Letters Patent No. 178,578, dated June 13, 1876; application filed May 5, 1876.

To all whom it may concern:

Be it known that We, GEORGE ALLAN and JAMES VVALLAOE BROWN, of London, Eng land, have invented an Improved Relay or Pecker, of which the following is a specification:

The object of the said invention is to record dots and dashes transmitted through a submarine cable or other difiicult circuit-it may be a land lineby closing and breaking local circuit on any of the well-known recorders, either chemical or otherwise, at a superior rate of speed.

As means for effecting the above object, we construct a relay or pecker so that the armature, or contact-maker shall act with a compound motion. Equilibrium-s inings are preferably applied to the contact-maker or armature.

By the above means a fall or rise of potential in the actuating-current will serve as effectually to make or break contact as if the current were reversed.

Figures 1 and 2 of the sheet of drawings hereunto annexed are illustrative of our said invention.

Fig. l (the contact-receiver) consists of the adjustable metal friction-piece a, kept in position by the springs Z); c, contact-maker, caused to vibrate in any convenient manner. The contact-maker c carries a disk, formed of the insulated portion d and conducting portion cl. d is connected to c, and thence to a local wire. When 0 vibrates, contact is made and broken with a by the revolution of the disk at d thereon. The disk is so adjusted that after contact has been made or broken it slides, instead of rolls, along the surface of the friction-piece a. the current, or even a diminution of the potential therein, contact is immediately broken or made by the motion or" the armature through the counter-revolution of the disk. 0, screw for adjusting the amount of revolution of the disk 61 d. Equilibrium-springsf are employed to retain the armature and disk in their nor- 2. The compound armature 0 61 d, formed of the lever c and the disk at d, in combination with the receiver a 0, operating substantially as and for the purposes set forth.

3. The combination of the parts 0 and d d with the springs f, operating as and'for the purposes set forth.

e. ALLAN. J. W. BROWN.

Witnesses:

E. T. HUGHES,

123 Chancery Lane, London. WALTER A. BARLOW,

123 Chancery Lane, London.

Therefore, on the reversal of i 

